For NS, TORFC = Low RCF
During a recent two-year period, engineers from Norfolk Southern (NS) and Transportation Technology Center, Inc. (TTCI) evaluated rail performance on four curves on the NS Whitethorne District, near Roanoke, Va., during two periods of 39 to 40 MGT (million gross ton) traffic accumulation. The objective was to document RCF (rolling contact fatigue) development, rail friction, and rail wear as influenced by the TORFC (top-of-rail friction control) materials NS currently uses. The rails were ground at the beginning of the test and again halfway through the test in April 2017, with the intent of producing similar conditions, after which a 39-40 MGT monitoring effort commenced, each with a different TORFC product.(1,2) The curve rails differed by rail mill, age and wear.